The synthesis of anilines and indolesfrom cyclohexanones using a Pd/C–ethylene system is reported. A simple combination of NH4OAc and K2CO3 under nonaerobic conditions was found to be the most suitable to perform this reaction. Hydrogen transfer between cyclohexanone and ethylene generates the desired products. The reaction tolerates a variety of substitutions on the starting cyclohexanones.
据报道,使用Pd / C-乙烯系统可从环己酮合成苯胺和吲哚。发现在无氧条件下简单的NH 4 OAc和K 2 CO 3组合最适合进行该反应。环己酮和乙烯之间的氢转移产生了所需的产物。该反应可耐受起始环己酮上的各种取代。
Oxovanadium-induced oxidative desilylation for the selective synthesis of 1,4-diketones
作者:Takashi Fujii、Toshikazu Hirao、Yoshiki Ohshiro
DOI:10.1016/0040-4039(92)89041-a
日期:1992.9
Silyl enol ethers underwent the VO(OR)Cl2-induced homo- or cross-coupling giving 1,4-diketones selectively via one-electron oxidative desilylation.
作者:Fatimat O. Badmus、Joshua A. Malone、Frank R. Fronczek、Rendy Kartika
DOI:10.1039/d0cc01796e
日期:——
An expedient synthesis of highly substituted tetrahydrobenzofuran via an unsymmetrical silyloxyallyl cation is reported. Conveniently generated under catalytic Brønsted acid conditions, nucleophilic capture of this reactive intermediate by silylenolate, followed by Paal-Knorr cascade cyclization in the presence of tosic acid monohydrate effectively constructed the tetrahydrobenzofuran core in a single
Brønsted Acid-Catalyzed Formal [2 + 2 + 1] Annulation for the Modular Synthesis of Tetrahydroindoles and Tetrahydrocyclopenta[<i>b</i>]pyrroles
作者:Joshua A. Malone、Courtney E. Toussel、Frank R. Fronczek、Rendy Kartika
DOI:10.1021/acs.orglett.9b01032
日期:2019.5.17
An expedient synthesis of tetrahydroindoles and tetrahydrocyclopenta[ b]pyrroles, highlighted by Brønsted acid catalyzed formal [2 + 2 + 1] annulation reaction, is reported. Using three readily accessible reaction components, i.e., an electrophilic species in silyloxyallyl cations and two distinct nucleophiles in silylenol ethers and amines, our chemistry enables the assembly and functionalization